Using the Terminal application you can remove the comma between city, time zone, or alternate text and time.
Quit World Clock Deluxe if it is running.
Open the Terminal application. It is located in the Utilities folder in your Applications folder.
Type (or copy and paste) this command:
defaults write com.mabasoft.WorldClockDeluxe4 ClockSeparator -string " "
Press Return.
You can also replace the comma with any other custom separator string.
Quit World Clock Deluxe if it is running.
Open the Terminal application.
Type (or copy and paste) this command:
defaults write com.mabasoft.WorldClockDeluxe4 ClockSeparator -string ", "
Press Return.